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A schematic of the 19-segment network shown in Fig. 1, showing network generation numbers, and diameter, inflow-rate and outflow-rate for each anatomic segment. Where a segment (e.g. 15) includes a secondary valve, it is dealt with computationally as two segments (numbered 15a and 15b); thus a total of 28 model segments is defined. Secondary valves are identified by the flow-rate through them, e.g. Q2a.
